Some characters differ by a single stroke or a gap of millimeters - and the words they belong to are not related at all. These pairs are the vocabulary of every "why did I misread that" story.
The classic lookalikes
- 未 wèi / 末 mò - top stroke short (not-yet, 未来) vs top stroke long (end, 周末). The longer stroke sits on whichever end is "later".
- 己 jǐ / 已 yǐ / 巳 sì - self / already / the zodiac snake: the opening at bottom is fully open, half, or closed. 自己已经 uses the pair constantly.
- 入 rù / 人 rén - enter vs person: the top stroke crosses left over right in 入, the reverse in 人.
- 拔 bá / 拨 bō - pull out vs poke/dial: 拔萝卜 vs 打电话, differing only in the right side's inner stroke.
- 辨/辩/辫 - distinguish, argue, braid: the center element (刀, 讠, 纟) carries the whole difference.
The fix that works
Do not drill lookalikes together on first exposure - that builds a confusion. Learn each inside its common word first (末 via 周末, already-familiar), then bring the pair together with the difference named: "末's top line is longer because the end is the far edge." LinZi's confuse-pair notes do exactly this on entries like 周末.
The harder class: polyphones
Lookalikes share shape; polyphones share the same character with two readings: 长 is cháng (long) in 长城 but zhǎng (grow) in 长大; 好 is hǎo in 你好, hào in 爱好; 还 is hái (still) or huán (return); 得 runs dé/de/děi. Resolution is lexical - the word tells you the reading, so again: learn words, and let each word teach its character's pronunciation. Every polyphone entry in the dictionary - 长城, 长大 - carries its own audio, so the difference is audible, not just written.
Common questions
How do I tell 未 and 末 apart?
未 wèi (not yet) has the longer bottom stroke; 末 mò (end, 周末) has the longer top stroke. Mnemonic: the end is the upper bound.
What are the most confusing Chinese characters for learners?
未/末, 己/已/巳, 入/人, 拔/拨, and the 辨/辩/辫 family are the canonical traps - plus polyphones like 长 (cháng/zhǎng) and 还 (hái/huán) which share one character.
How many Chinese characters have multiple pronunciations?
A few hundred common ones - enough that every learner meets them early (的, 了, 长, 好, 行, 着 are all polyphonic). The word context decides the reading.